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This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2023 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

To load this example and for sample queries, please see the SCRIPT.txt file.

This folder contains a set of simple examples illustrating how to use B-Prolog constraint support with Logtalk. These examples are adapted with permission from the original author, Neng-Fa Zhou.

The B-Prolog (::)/2 finite-domain built-in predicate clashes with the Logtalk (::)/2 message sending operator. The solution is to use instead the alternative B-Prolog in/2 built-in predicate.

The built-in predicate_property/2 predicate fails to report some of the constraint predicates as built-in predicates. One workaround is to encapsulate calls to these predicates using the {}/1 Logtalk control construct.